best days to fly

The giant travel aggregator site Kayak has some advice for consumers on the best times to book travel in order to snag the cheapest airfares. Drumroll please… Don’t book too early, and don’t book too late. OK, that’s slightly glib. But that’s basically what the site — which says it averages 100 million search queries a month — concluded after sorting through a year’s worth of data. Among its recommendations: Book domestic trips 21 days before departure. Those who went …